Stop in for a cup of coffee

Ok I have a question. I want to eventually swap out the headers for a manifold. I have a 318 in my dart. I found these on marketplace place. 1973-1976 Mopar “A” Bodies | Mopar exhaust maniford great shape went with headers instead | Facebook
It says small block but is there anything else I should be looking for in regards to fit?
Nope, too new. The 68-70 340 manifolds are the first choice and the 71-74 manifolds are next best. There are combinations of LA and Magnum manifolds that work well too. There are many threads here on FABO about all those choices. Yes, if the headers are in good shape I would probably leave them.